Submarine boat



vom SANDEN AND H TECHEL.

SUBMAHINE BOAT. ,APPLICATION FILED JAN Patented 0011. 117, 1922.

Patented @et l?,

STATES narrar caricia..

lKURT VON SANDEN, 0F KRNSHAGEN, NEAR KIEL, AND HANS TECHEL, 0F KIEL,

GERMANY, ASSIGNORS TO FRIED. KRUPP AKTIENGESELLSCHAFT GERMANIA- WERFT,0F KIEL-GAARDEN, GERMANY.

SUBMARINE BOAT.

Application led January 14, 1921.

To all fwhomit may con-cern.

Be it known that we, KURT voN SANDEN, residing at Kronshagen, near .KiehG ermany, and HANS TEGHEL, residing at lKiel, Germany, both citizens ofthe Republic of Germany, have invented a certain new and usefulImprovement in Submarine Boats, ol which the following is aspeciiication.

This invention relates to submarine boats and has for its object toproduce boats of this kind which when submerged at the greatest depthspractically possible will, notwithstanding, offer absolute reliabilityagainst the pressure-resisting hull being crushed. l.

This object is attained in accordance with the present invention by thefact .that said pressure-resisting hull is itted with a far greaternumber of square frames than was hitherto customary in shipbuilding andsubmarine boat construction; the distance between the individual squareframes being reduced to such an extent that at its maximum it will beequal to only about one and onehalf times the value of the meanproportional between the mean diameter of the pressure-resisting hulland the wall thickness thereof.

The invention will be further described with reference to theaccompanying drawing which illustrates, by way of example, twoembodiments ott. the subject matter ot the present invention and inwhich:

Fig. l shows diagrammatically the first embodiment in a longitudinalsection through a submarine boat,

Fig. 2 is a crossfsection, on an enlarged scale, on line 2 2 in Fig. l,looking from the left,

Fig. 3 is a longitudinal section through a part of thepressure-resisting hull, drawn to the same scale as Fig. 2, and

Fig. 4l is a like view of the second form of construction of thepressure-resisting hull.

Referring to this drawing, the submarine boat disclosed in Fig. 1comprises vin the customary manner a pressure-resisting hull A ofcircular cross section and a thin-walled outer shell B, enveloping thesaid hull and having the necessary vessel shape. Within thepressure-resisting hull the mean diame- Serial No. 437,322.

ter of which is D while its thickness of wall is al, there are arrangeda plurality of square frames C. In accordance with the invention thespace between the square frames C, measured from the moulding-edge ofthe one trame to the moulding-edge of the adjoining frame, is sodiinensioned that it will be equal to or less than lfm/Dd.

The 'form of construction illustrated in Fig. 4 merely diieis from theone abovedescribed by the fact that there are always arranged betweentwo square frames disposed at a greater distance apart and having anangular cross section, two square frames having a horizontally lyingrectangular cross section. However in this case too, the distancebetween one frame and the other is equal to or less than Lw/Dd. Thearrange- 0 ment of alternately high and low frames will be found toembody the advantage, relatively to the construction illustrated in Fig.3 in which the frames are all of one height, that the available room isutilized to an improved degree.

Vhereas submarine boats the pressure-resisting hull of which has beendesigned in accordance with the methods of calculation hitherto usualand in which the square frames are spaced as usual, will, when submergedat lower depths even than originally calculated for be crushed by theplates of the pressure-resisting hull being bulged-in between the squareframes, the boatsA constructed in accordance with the present inventionwill be able to successfully withstand the pressure consequent upon anydepth of submersion practically entering into consideration.

Claims:

l. In a submarine boat a pressure resisting hull, frame members for saidhull, said frame members being spaced so that the distance between themvwill at maximum be equal to one and one-half times the value of themean proportional intermediate the mean diameter of thepressure-resisting hull and the wall thickness thereof.

2. In a submarine boat a pressure resistin@ ing hull, a frame for saidhull embodying members of low and high prole, the members of low profilebeing arranged between two members of high profile spaced a greater Theforegoing specification signed at Kiel, distance apart, the distancebetween said Germany, this 25th day of November, 1920.

frame members being at maximum equal to KURT VON SANDEN.

one and one-half times the value of the mean DR. ING. H. TECHELL 5proportional intermediate the mean diame In'presence of.-

ter of the pressure resisting 11u11. and the J. PUDIMAT,

Wall thickness thereof.- i s WILHELM ZILPAN.

